BlackRock’s purpose is to help more and more people experience financial well-being. As a fiduciary to investors and a leading provider of financial technology, our clients turn to us for the solutions they need when planning for their most important goals. As of June 30, 2019, the firm managed approximately $6.84 trillion in assets on behalf of investors worldwide.

The performance quoted represents past performance and does not guarantee future results. Investment return and principal value of an investment will fluctuate so that an investor's shares, when sold or redeemed, may be worth more or less than the original cost. Current performance may be lower or higher than the performance quoted.

The Fund’s returns prior to September 17, 2018 are the returns of a predecessor fund that reorganized into the Fund on September 17, 2018. The predecessor fund had the same investment objectives, strategies and policies, portfolio management team and contractual arrangements, including the same contractual fees and expenses, as the Fund as of the date of the reorganization. As a result, the performance of the Fund would have been substantially similar to that of the predecessor fund.

Source: Lipper. Data reflects different methodology from the BlackRock calculated returns in the Returns tab. The $10,000 Hypothetical Over Time chart reflects a hypothetical $10,000 investment in the investor class of shares noted and does not assume the max sales charge. Had sales charge been included, returns would have been lower. The chart uses total return NAV performance and assumes reinvestment of dividends and capital gains. Fund expenses, including 12b-1 fees, management fees and other expenses were deducted. Performance for other share classes will vary.

Overall Lipper Leaders ratings based on an equal-weighted average of percentile ranks for each measure over 3-, 5-, and 10-year periods (if applicable) and do not take into account the effects of sales charges for these categories (Consistent Return, Preservation, Total Return, Expense, and Tax Efficiency) as of Aug 31, 2019 out of 48, 5,851, 48, 54 and 48 Funds, respectively in Lipper's GNMA Funds classification.

The fund itself has not been rated by an independent rating agency. Credit quality ratings on underlying securities of the fund are received from S&P, Moody’s and Fitch and converted to the equivalent S&P major rating category. This breakdown is provided by BlackRock and takes the median rating of the three agencies when all three agencies rate a security the lower of the two ratings if only two agencies rate a security and one rating if that is all that is provided. Unrated securities do not necessarily indicate low quality. Below investment-grade is represented by a rating of BB and below. Ratings and portfolio credit quality may change over time.

Negative weightings may result from specific circumstances (including timing differences between trade and settle dates of securities purchased by the funds) and/or the use of certain financial instruments, including derivatives, which may be used to gain or reduce market exposure and/or risk management. Certain transactions the funds may utilize may give rise to a form of leverage through either (a) additional market exposure or (b) borrowing capital in an attempt to increase investment return. The use of such transactions includes certain leverage-related risks, including potential for higher volatility, greater decline of the fund’s net asset value and fluctuations of dividends and distributions paid by the fund.

Portfolio Managers

Portfolio Managers

Matthew Kraeger, Managing Director, is lead portfolio manager for mortgage portfolios on BlackRock's Global Fixed Income platform. He is responsible for the Mortgage Portfolio Team.

Mr. Kraeger has been a portfolio manager within the mortgage team since 2004, serving as a PM across both institutional accounts and retail funds. Mr. Kraeger has been a PM on the BlackRock GNMA Fund, which was ranked first in the Lipper Fund GNMA category for both 2008 and 2009 3 year periods, along with the BlackRock U.S. Mortgage Fund and the U.S. Government Bond Portfolio which was ranked first in its Lipper Fund category for the 2015 3 year period. Mr. Kraeger began his investment career as an analyst in BlackRock's operations department in 2000 and joined the Portfolio Analytics Group in 2002.

Mr. Kraeger earned a BS degree in finance from Syracuse University in 2000.

Siddharth Mehta, Director, is a member of the Mortgage Portfolio Team within BlackRock's Americas Fixed Income Alpha Strategies.

Mr. Mehta joined the Portfolio Management Group in 2008. From 2006 to 2008, Mr. Mehta was amemberof BlackRock's Risk and Quantitative Analytics Group, where he was responsible for supporting the mortgage team. Mr. Mehta began his investment career with BlackRock as an analyst in the Portfolio Analytics Group.

Mr. Mehta earned a BS degree, magna cum laude, in electrical engineering from the University of Michigan in 2005.

BlackRock funds are also available through certain brokerage accounts. Visit your brokerage today to see how you can get started.

Carefully consider the Funds' investment objectives, risk factors, and charges and expenses before investing. This and other information can be found in the Funds' prospectuses or, if available, the summary prospectuses, which may be obtained by visiting the iShares ETF and BlackRock Fund prospectus pages. Read the prospectus carefully before investing. Investing involves risk, including possible loss of principal.

The Funds are distributed by BlackRock Investments, LLC (together with its affiliates, “BlackRock”).

Important Information

Carefully consider the Funds' investment objectives, risk factors, and charges and expenses before investing. This and other information can be found in the Funds' prospectuses or, if available, the summary prospectuses which may be obtained by visiting the iShares Fund and BlackRock Fund prospectus pages. Read the prospectus carefully before investing.

Source: BlackRock and Morningstar. As of 6/30/19. *Based on 5-year performance. 19 of 24 funds outperformed their respective Morningstar category median 5-year performance. 19 of 24 funds accounts for 79% of BlackRock active fixed income mutual funds. Over the 1, 3, 5 and 10-year periods, 15, 18, 19 and 19 of BlackRock fixed income funds outperformed the Morningstar category median. 22 funds have 5-year performance track records. Based on institutional share classes of BlackRock open-end taxable and tax-free fixed income funds (based on 24 funds). 97% statistic based on $67.3B out of $69.3B AUM of all institutional share classes of the funds. Strategic Income Opportunities Fund (inst. class) AUM is $22.5B which accounts for 33% of the total $69.3B AUM of funds that outperformed their Morningstar category median 5-year performance.

†Source: BlackRock and Morningstar. As of 5/31/18. Current fee rankings may vary based on recent and frequent prospectus updates to the funds within the respective Morningstar categories. Expenses are based on the funds’ most recent prospectus net expense ratios, excluding investment dividend expense, interest expense, and certain other fund expenses. Morningstar category net expense ratio also excludes these expenses. Includes active open-end taxable and tax-free fixed income mutual funds only, and excludes index funds. Analysis based only on institutional shares of BlackRock active retail fixed income funds vs. institutional shares of active fixed income funds within their respective Morningstar categories. 88% of BlackRock active fixed income funds are in the lowest fee quartile (22 out of 25 funds). Based on 25 BlackRock active taxable and tax-free funds. Institutional shares may not be available to all retail investors. Performance for different share classes may vary.

The fund is actively managed and its characteristics will vary.

Bond values fluctuate in price so the value of your investment can go down depending on market conditions.

Fixed income risks include interest-rate and credit risk. Typically, when interest rates rise, there is a corresponding decline in bond values. Credit risk refers to the possibility that the bond issuer will not be able to make principal and interest payments.

Principal of mortgage- or asset-backed securities normally may be prepaid at any time, reducing the yield and market value of those securities.

The fund may use derivatives to hedge its investments or to seek to enhance returns. Derivatives entail risks relating to liquidity, leverage and credit that may reduce returns and increase volatility.

‡Morningstar Analyst Rating™is not a credit or risk rating. It is a subjective evaluation performed by Morningstar’s manager research group, which consists of various Morningstar, Inc. subsidiaries (“Manager Research Group”). In the United States, that subsidiary is Morningstar Research Services LLC, which is registered with and governed by the U.S. Securities and Exchange Commission. The Manager Research Group evaluates funds based on five key pillars, which are process, performance, people, parent, and price. The Manager Research Group uses this five pillar evaluation to determine how they believe funds are likely to perform relative to a benchmark, or in the case of exchange-traded funds and index mutual funds, a relevant peer group, over the long term on a risk-adjusted basis. They consider quantitative and qualitative factors in their research, and the weight of each pillar may vary. The Analyst Rating scale is Gold, Silver, Bronze, Neutral, and Negative. A Morningstar Analyst Rating of Gold, Silver, or Bronze reflects the Manager Research Group’s conviction in a fund’s prospects for outperformance. Analyst Ratings ultimately reflect the Manager Research Group’s overall assessment, are overseen by an Analyst Rating Committee, and are continuously monitored and reevaluated at least every 14 months. For more detailed information about Morningstar’s Analyst Rating, including its methodology, please go to global.morningstar.com/managerdisclosures/.

The Morningstar Analyst Rating (i) should not be used as the sole basis in evaluating a fund, (ii) involves unknown risks and uncertainties which may cause Analyst expectations not to occur or to differ significantly from what they expected, and (iii) should not be considered an offer or solicitation to buy or sell the fund.

Performance results reflect past performance and are no guarantee of future results. Investment return and principal value of shares will fluctuate so that shares, when redeemed, may be worth more or less than their original cost. All returns assume reinvestment of all dividends. Performance information shown without sales charge would have been lower if the applicable sales charge had been included. Performance during periods of exceptional market conditions should not be expected to be repeated in a normal market environment. Current performance may be lower or higher than the performance data quoted.

Investing involves risk, including possible loss of principal.

Fund details, holdings and characteristics are as of the date noted and subject to change.

Yields are based on income earned for the period cited and on the Fund's NAV at the end of the period.

Some BlackRock funds make distributions of ordinary income and capital gains at calendar year end. Those distributions temporarily cause extraordinarily high yields. There is no assurance that a fund will repeat that yield in the future. Subsequent monthly distributions that do not include ordinary income or capital gains in the form of dividends will likely be lower.

The Funds are distributed by BlackRock Investments, LLC (together with its affiliates, “BlackRock”).